Glue applicator



June 24, 1941. H, ANDERSCNl 2,247,110

i GLUE APPLICATOR Fixed Jan. 23, 1959 9 shee'spsheepl INvEN-ron a HELMERANDE 50N s /06 ATTORNEY June 24, 1941. ,MNHDERSQNy 2,247,110 u GLUEAPPLICATOR Filed Jan. 23, 1939 9 Sheets-Sheet 2 f-- 2 59 f5?" .f6

H .J J5( f 45 INVENToR. 60. HELMEH ANDE son /zf L o d. BY Z4 I??? /OATTORNEY June 24, `1941. H. ANDERSON GLUE APPLICATOR Filed Jan. 25,.1959

9 Sheets-Sheet 3 INI/ENTER. HELM ER ANDERSON ATTORNEY June 24, 1941. H.ANDERSON 2,247,110

GLUE APPLICATOR y Filed Jan. 2 3, 1959 9 sheets-sheet 4 INVENTOR.

AELMER ANDERSON BMM A TTORNEY June' 242 l n H. ANDERSON MKM@ GLUEAPPLIGATOR Filed Jan. 23, 1939l 9 Sheets-Sheet 5 INVENTOR.

HEM/1ER AND Rom B A TTORNEY Juin@ 24, Q.. v I H. ANDERSQN 2,247,111@

`GLUE APPLICATOR INVENToR. HELMEH' A NDER som A TTORNEY jun@ 24, R941.

lH. ANDERSON Filed Jan. 23, 1959 GLUE APPLICATOR 9 Sheets-Sheet '7INVENTOR HEI-MER ANDERSON BMM AT1-@num .june 24, L H ANDERSQN 2,247,1H@

GLUE APPLICATOR 245 INVENTOR. 244 HELMER ANDERSON Ffv'la AmRNEY June 24,1941. A H. ANDERSON 2247M0 GLUE APPLICATOR Filed Jan. 25, 1939 9Sheets-Sheet'Q Patented June 24, 1941 GLUE APPLICATOR Helm/sr Anderson,Minneapolis, Minn., assigner to General Mills, Inc., a corporation ofDelaware 14 Claims.

This invention relates to gumming applicators for applying adhesive tothe mouth parts of bags intended tobe held closed by such adhesive.

An object of the invention is to provide a novel machine of thecharacter which may be used in connection with and as an attachment to atypical packaging machine adapted to fill paper bags with weighed orotherwise measured quantities of material.

Another object of the invention is to provide a novel means .to hold thebag closed against access of any of the adhesive to the bag contents andyet to hold the mouth of the bag open so that adhesive may be applied tothe inner surface thereof.

Another object or" the invention is to provide a novel arrangement ofoperating mechanisms for raising and lowering such gumming heads.

Still another object of the invention is to provide a novel grouping andmeans for operating such gumming heads wherein a middle gumming head anda pair of side gumming heads, on opposite sides of the middle head, areprovided with means for lowering and raising the middle head andoscillating the saine and with means for alternately lowering andraising the side heads in unison with the oscillations of the middiehead.

With the above and other objects in View as will be hereinafterapparent, the invention consists in general of certain novel details ofconstruction and combinations of parts hereinafter fully described,illustrated in the accompanying drawings and speciiically claimed.

In the accompanying drawings like characters of reference indicate likeparts in the several views, and: i

Fig. 1 is a iront elevation of the novel package gumming machine.

Fig. 2 is a View showing the mechanism in the bag receiving position.

Fig. 3 is a vertical sectional view on line 3-3 of Fig. 1.

Fig. l isa plan View with some parts omitted to more clearly show theinvention.

Fig. 5 is a horizontal sectional view on the line 5--5 of Fig. 1.

Fig. 6 is an enlarged detail section on line 6 6 of Fig. 5.

Fig. 'I is a reduced section on the line l-l ci Fig. 6 showing a pawland clutch disk used herein with lthe pawl engaged.

Fig. S is a section on the line 3 3 of Fig. 5 showing an air shut ofigovernor used herein.

Fig.` 9 is a section on the line 9 9 of Fig. 2 showing the gumming headsused herein in the initial gum applying position.

Fig. 10 is a similar section to Fig. 9 showing the gumming heads at theend of lthe gum application stroke and with certain parts omitted.

Fig. 11 is a section on the line ll-ll of Fig. l0.

Fig. 12 is a section on the line l2-l2 of Fig. 10, showing a means usedherein for holding the package or bag top in gum receiving position, theView also showing the gum applied to the package or bag top.

Fig. 13 is a horizontal detail sectional View on the line l3l3 of Fig.l, showing a gear rack guide way used herein.

Fig. 14 is a fragmentary detail front elevation showing an air linecontrol used herein.

Fig. l5 is an enlarged detail section on the line 15--15 of Fig. 14showing the air line control valve used herein.

Fig. 16 is an enlarged fragmentary vertical sectional View on the linel-it of Fig. 10, showing a center gumming head used herein.

Fig. 17 is an enlarged axial section oi a nozzle shown in Fig. 16.

Fig. 18 is asection on the line i-lS ci Fig. 17.

Fig. 19 is an enlarged section of the line I9-I9 of Fig. 11 showing oneof the gumming heads.

Fig. 20 is a sectional View on line i-ii of Fig. 21, showing a sectionthrough one of the air control valves used herein.

Fig. 21 is a section of Fig. 2G on the line E l-ZZ l, showing certainvalve ports.

Fig. 22 is a. View similar to Fig, 2l, showing the ports partly opened.

Fig. 23 is a View similar to Fig. 21 but showing the por-ts fullyopened.

Fig. 24 is a View similar to Fig. 21 but showing still another positionof the valve.

Fig. 25 is `a detail bottom View of the valve and stem, showing theports.

Fig. 26 is a vertical sectional View on the line 22e-2t of Fig. 3showing a. gum tank used herein.

Fig. 27 is a schematic View showing the gum tank, air control valves andthe gum dispensing heads.

This applicator is for use in applying gum to the mouths of bags whichhave been filled by a packaging machine and constitutes an attachmentfor such a packaging machine. While the device may be used with variousforms of packaging machines those parts of one such machine whichdirectly relate to the present applicator will rst be described, itbeing clearly understood that variations may be made in the packagingmachine without necessitating variations in the applicator althoughvariations may be made in the construction of the applica-tor withoutdeparting from the scope of the invention as set forth in the claimshereto appended.

This packaging machine is indicated in general at 3Q and includes a mainframe 3l only a part of which is shown in the drawings. The main frameSi is provided with legs 32 and mounted on the lower ends of the legsare casters 33 so that the machine may be moved from place to place asmay be desirable. As shown best'in Fig. a vertical axle 3ft is fixed toor formed with the main frame and projects upwardly therefrom.ll/iounted rotatably on the axle 36 is a conveyor disk having a seriesof package or bag holding compartments 35 opening outf wardly from thedisk to enable bags to be inserted and removed and these compartmentsare open at the top to permit the top parts of the bags to projectthereabove for purposes which will be present explained. The disk 35 isrotated at intervals by any suitable means which is not here shown, asthe same forms no part of the present invention. The rotation takesplace in the direction of the arrow in Fig. 5 :and by such rotation thecompartments are brought successively to a gumming station A, the diskbeing stopped long enough to permit the bag in the compartment at thegumrning station A to undergo the gumming operation. At 3T is shown ashaft driven from the packaging machine and suitably journalled therein.This shaft operates through a reduction gearing preferably of th-e wormand worm wheel type, the casing for the worm beingindicated at 38 andthat for the worm wheel being shown `at 39. The worm wheel is fixed on ashaft liti which projects upwardly through the casing 39 and carries onits upper end a bevel gear il which meshes with a bevel gear (l2 fixedonra shaftv i3 which is journalled in suitable bearings such as areshown at ifi and d5. Also fixed on the outer part of the shaft :i3 is abevel gear 455, the purpose of which will be presently apparent.

The cumming machine frame The gumming machine itself has its workingparts supported by a frarnehaving a lower section and an upper section.The lower frame section consists of a pair of parallel and verticallydisposed bars i? which are supported from the frame 3! by brackets i3shown clearly in Figs. 2 and 5. The upper ends of the frame bars 4l areconnected by a cross bar 4S (Fig. 3).

The upper frame includes a spaced and parallel pairrof side frames ofinverted Ufshape each having a forward leg 5d, a rear leg 5|, and aconnecting section 52 extending lbetween the top portions of the legs 5Eand 5l (Fig. 3). The lower ends of the legs 5d Vare connected by 'a T-shaped cross bar 543 which has its stem connected to the cross-bar i9 bybolts 55, thus joining the upper and lower frame portions. The upperends of the legs El? are connected by a crossbar and the upper ends ofthe legs 5l are connected by an irregularly shaped casting 5l'.

The driving arrangement A main drive shaft 53 is journalled in bearings55 Supported from the frame bars l1 by brackets $3. On one end of theshaft 58 is fixed 8@ with the pin 8%.

a bevel gear El which meshes with the gear 48 and thus the shaft 58 isdriven. On the other end of the shaft 58 is fixed a spur gear 62 whichmeshes with a spur gear 63 fixed on a cam shaft Srl which is journalledin bearings S5 supported by the bars Lil.

A cross-bar @t is fixed on the frame bars 41 and on the right hand end(Figs. 1 and 6) of this cross-bar is fixed a vertical bearing Si.Journalled in the bearing $1 is a sleeve 68. The s laft ll has fixedthereon a bevel gear 59 which meshes with a bevel gear '[52 formed onthe lower end of the sleeve 68.

Fix-ed to the right hand member 5i! (Fig. 1) is a bracket "H carrying abearing 'l2 vertically alined above the sleeve 63. In the bearing 'l2and sleeve e8 is journalled a shaft 73. In order to drive the shaft ltat the proper time (Figs. 6 and '7) the following mechanism is employed.On the upper end of the sleeve 68 is fixed a clutch disk l5 having anotch 'l5 at one point in its periphery. Keyed to the shaft 'i3 abovethe disk ill is an arm 'it having an arcuate slot 11 at its outer end. Apawl i3 is pivoted to the arm i5 as at i9 and carries a pin 8! whichprojects through the slot il. The pawl i3 is provided with a nose 8ladapted to enter the notch l5. The arm 'le is provided with a hub 82from which projects a pin 83 connected by a spring The spring tends toforce the pawl into the notch 'i5 to cause the shaft 'i3 to rotate withthe sleeve 58 but, at certain phases in the operation, as will bedescribed, the pawl is disengaged from the disk 'it and the shaft i3ceases to rotate.

On the upper end of the shaft 'i3 is fixed a bevel gear 85 which mesheswith a bevel gear 8&5 carried on the right hand end (Fig. l) of an uppercam shaft 3l. At its right hand end the shaft Si is journalled in abearing 88 carried by the bracket li. At its other end the shaft isjournalled in a bearing 89 supported by a bracket SQ from the left handmember Eil. Obviously this shaft Si operates only when the shaft 'i3 isin operation.

The pawl releasing mechanism Prior to the bag reaching station A (Fig.5) it is necessary that the shafts 'i3 and 8l be at rest. When the bagreaches station A it is desirable that these shafts rotate with theshafts 58 and 54. To effect this, there is mounted on the left handmember il (Fig. l) a vertically spaced pair of bearing brackets 9iwherein is journalled a rock shaft 92. On the upper part of lthis shaftthere is fixed a nger 93 in the form of an angled plate and this nger isheld to normally proj-ect. into the path of the bag as shown in fulllines in Fig. 5. On the lower part of the shaft 92 is xed a rock arm 94to which is pivoted o-ne end of a link or connecting rod 95. Pivoted onthe member 56 is an arm 96 carrying a pin Sli. A spring 98 has one endsecured to the right hand member il and its other end engaged on a pin99 projecting from the left hand end of the link 95.

The spring S8 normally urges the arm S3 into the path of the bag holder3%. This causes the pin e? to engage the tail ilfl of the pawl as shownin Figs. 5 and 'l and thus lifts the pawl so -as to cause the disk l@ tomove freely with respect to the shaft 13. When a bag filled compartment36 reaches station A in its travel in the direction of the arrow shownin Fig. `5 the arm 93 will be engaged by the bag and moved to the dottedline position there shown. This will effect rocking of the shaft 92 andconsequently of the arm iid which, through connection by the Ilink 95will move the arm SS and free the pin 97 from the tail it. As thisoccurs the spring Sli will force the nose BI inwardly and, upon rotationof the disk lli, the notch it will be brought opposite the nose so thatthe nose will engage in the notch iii. This will then eifect rotation ofthe shaft '33, arm it and pawl it. After the necessary operations havebeen performed on the bag and it has been moved from stationlA, thespring 9S will force the arm et to its full line position whereupon thepin ill will move into the path of the revolving tail and force the pawlnose 8E out of the notch l5 thus freeing the shaft i3 from rotation withthe sleeve 63.

The hay lzoiding and mouth forming mechanism Referring particularly toFigs. 2 and 3 it will se seen that there is shown a bag B as it appearsat station A and that the bag is provided with a portion N compressed toform a neck and with a mouth M. The means for forming the neck willfirst be considered.

On the shaft 58 is fixed a cam disk lili having about oneehalf itsperiphery concentric with the shaft 53 to form a dwell portion H92. Thelow spot tilt of the cam is opposite the center of the dwell. Bracketsita are carried by the lower ends of the members il and these bracketssupport a transverse shaft M35. On the shaft i515 is rockingly mountedthe rear end of a bent lever HB6 which is provided centrally with a yokeitl wherein is revolubly mounted a cam roller itil. Pivoted to theforward end of the l-ever liii is a link itt which extends upwardly fromits pivoted end. Extending between the legs 5i) is a shaft IIii whereonis mounted a lever having a gear segment IiI forming its rear arm and aforwardly extending arm I i2 to which the upper end of the link le-i ispivotally connected. A coiled tension spring iid has its lower endconnected to the lever arm H2 and its upper end connected to a bracketIifl. This spring thus urges the arm I i2 upwardly and by means of thelink i139 keeps the lever IGS raised so that the cam roller itt isconstantly in contact with the cam IBI.

The members El support a transverse shaft I i wherecn is fixed a gearsegment IIS which meshes with the segment III so that rocking of theshaft i iii causes like rocking of the shaft I i5. Fixed on each of theshafts il@ and H5 is a pair of laterally spaced rock arms iII whichdepend from the shafts. Mounted on the lower part of the frame memberstitl is a pair of laterally spaced grooved guide bars I I8 and on theframe members 5i similar grooved guide bars I I9 are alined with thebars liti, the adjacent ends of hars IIB and il@ being spaced to allowpassage of the bag holders 3d and the upper parts of the bags B as shownin Fig. 3. Slidable in the grooves of each pair of guide bars is a plateIZB and from each of these plates extends a pair of arms I2?, each pairof which inclines upwardly and convergingly toward the pair of the otherplate. The upper and adjacent ends of each pair of arms IZI carries aneck forming blade I 22 which blades are in opposed alinement.

Links H23 connect the lower ends of the arms i il with the slides justdescribed.

in the operation of this portion of the invention, rotation of the shaft53 from the shaft 3l causes rotation of the cam IeI which, with thespring H3, effects oscillation of the lever IIi. This in turn effectsoscillation of the gear segments which swing the lower ends of the armsII'I toward each other and thus move the blades i222 from the openposition shown in Fig 2 to the closed position shown in Fig. 3. it willbe seen that the cam roller ISS rests on the dwell |02 of the cam whenthe blades are closed so that once the blades have closed as in Fig. 3they will be retained in closed position for about one-half revolutionof the cam I and shaft 5S.

Bag mouth opening mechanism The bag mouth opening means will now be delscribed. FiXedly connected to the shaft 53 is a cam iEt, preferablytermed the mouth opening cam. Rockingly mounted on the shaft I is alever i525 similar in construction to the lever ISE. A link It@ has itslower end pivoted to the forward end of the lever E25. A bracket I 26projects forwardly and downwardly from the member 5S and carries a stubshaft I 2l. On the stub shaft is pivoted a bell crank having an arm |28to which the upper end of the rod I 2t is pivotally connected. The lefthand member 5d (Fig. 4) has formed integrally therewith a header brackett2? which supports a pair of forwardly projecting stub shafts I t9. Onthe forward shaft 29 is mounted a sleeve Iilil from which a rock arm I3Iextends downwardly and forwardly as best seen in Fig. 3.

u and remote arms I.

The lower end of the rock arm i3I is connected by a link It-Z with theremaining arm Iii of the bell crank having the arm E28. On the sleevei3d is also carried a gear segment i3d which meshes with a gear segmentIt carried by a sleeve ISS revolubly mounted on the remaining shaft IES.4Thus the sleeves i3@ and IBS are caused to move in vunison but inopposite directions. Projecting forwardly and rearwardly from therespective sleeves are rock arms I 3l. Stub shafts 37 projectrespectively from the members til and 5E and on these shafts are mountedrock levers having proximal arms 538 An adjustable link It@ connects theforward arm I3? with the corresponding arm It@ and an adjustable linkit! con nects the rear arm I3? with the other arm |39. The link Ill-ihas an eye M2 and a coiled tension spring hit has its lower end engagedin said eye and its upper end supported by a bracket Ili xed on themember 5i. yspaced L-shaped fingers M5 are carried by each of the armsE33.

in the operation of this part of the mechanism the rotation of the camIM combined with the action of the spring It causes the rod I2@ toreciprocate. This causes oscillation of the bell crank formed by thearms I23 and ISS which, through the link It oscillates the arm ISI Thisoscillation and the gear connection of this arm iti oscillates the armsit? which oscillates the levers having the arms E38 and E35). Themovement of the arms its causes the fingers it to move from the positionshown in Fig. 2 to the position shown in Fig, 3, thus engaging the bagmouth M and holding its sides apart, as clearly shown in Figs. 2 and l2for the reception of gum.

The center cumming mechanism Carried by the shaft 58 is a third cam Iiwhich actuates a lever I 4'.' similar in construction and mounting tothe levers itt and |25. Connected pivotally to the forward end of thelever Ifii is the lower end of an upstanding connecting rod It. Theupper end of the rod Hit is pivotally connected to one arm of a lever|49 pivoted intermediate its ends to a bracket |50 supported by themember 5S. Pivotally connected to the other arm of the lever |49 is adepending link liil having its lower end pivoted to a frame |52. At eachend of the frame there is carried a pair of spaced rollers |53 eachhaving a pair of flanges. Ihese rollers roll on opposite sides of aguide bar l5@ secured to the member 51 at its upper end and to a bracket|55 carried by one of the members 5|. The lower end of the frame |522 isprovided with alined bearings |55 wherein is journalled a tilting frame|51. Carried by the frame |51 is a central gumming unit indicated ingeneral at |58 and specifically shown in Figs. 16 and 17. No detailreference characters have been applied to this part in the general viewsin order to avoid confusion. The foregoing describes the means forraising and lowering the central gumming unit.

The mechanism for imparting a wiping motion to this unit will now bedescribed. Referring particularly to Figs. l, 9, and 10, there is fixedon the shaft 6d a face cam |53. On a post or stub shaft ISU projectingforwardly from the member E6 is a two armed lever ll having a lower armcarrying a roller |62 which bears against the peripheral portion of oneside face of the cam |59. The other arm of the lever lill is providedwith a longitudinal slot |53 and a bracket |54 is slidably mounted foradjustment and fixing on the arm by suitable bolts so that the activelength of this arm can be controlled. The bracket l has one end of alink |55 connected thereto. The other end of this link |65 is connectedto the lower end of a rock arm |66 projecting downwardly from'a sleeve|65 rockingly mounted on a shaft |51 supported in a bracket |58 securedto the right hand member d1.. Projecting upwardly from the sleeve is arock arm |69. A link |10 has one end pivotally connected to the upperend of the arm. The other end of this link is mounted on a pin |1|projecting from the side of a rack bar |12 slidably mounted on a guideor carrier |13 supported by the frame bars 5G. The carrier |13 supportsa bearing |14 wherein is journalled the shaft of a gear segment |15 fromwhich extends a normally upright blade |18 having a slot |11 therein.'Ihe frame |51 has laterally projecting journals |18 on one of which isxed an arm |18 carrying a pin |86 mounted in the slot |11.

In the operation of the gumming mechanism rotation of the cam litscauses oscillation of the lever |41, the latter being held raisednormally as will bel presently understood. Through the connecting rodHi8 this motion is transmitted to the lever Util and thus to the frame|52 and gumming head |53. The pin |86 on the frame normally lies at thecuter end of the slot |114 but will move down in that slot as the cam|46 rotates to bring its high part downward thus causing thelower end ofthe gumming head to enter the mouth lvl of the bag. At the same time theshaft Gli will rotate, thus rotating the cam |59, which oscillates thelever ll and through the link |85 causes oscillation of the rock arm|56. This causes the rock arm |69 to oscillate and pull the rack har |12to and fro. This oscillates the blade llt. The oscillation ol the bladecauses the pin |85 to eiect oscillation of the frame |51 and the gumminghead |58. Thus the lower end cf the gumming head will be alternatelyraised and lowered during the rotationl of the shaft 53 and will at thesame time be oscillated.

Spring is secured to lever lil and to support 286 holding roller |62against the cam surface of cam |59.

The side gumming mechanisms On the shaft Ed is xed a pair of cams |8|and |82 which oscillate bell crank levers |83 having lateral arms liextending from the pivots |85 by which they are mounted on the member55. rIhe outer ends of the arms |84 are connected pivotally to the lowerends of connecting rods |85 which have their upper ends connected to theends of rock arms |81. These rock arms are xed on shafts |88 journalledin brackets |59 and also have xed thereon rock arms connected by linkslsl to frames or slides lez. II'he slides |92 are mounted in guides |93having brackets ld at their upper and inner ends which are mounted onpins |55. The brackets |94 are provided with arcuate slots |96 so thatbolts |91 may extend through the brackets l and the slots |96 to permitangular adjustment and secure the guides in adjusted position. SpringsIEB are connected to the arms |31, extend downward and are connected attheir lower ends to brackets |939. On the slides |92 are mounted sidegumming heads indicated in general at Edil, these gumming heads beingonly shown in general in the main gures, the operation being indicatedin Figs. 9 and 1G and the specific construction being shown in Fig. 19.

in operation, rotation of the shaft El rotates the camsY ll and |82which causes oscillation of the bell cranks |83. The connecting rods |36are reciprocated by the arms |34 of these bell cranks and consequentlyoscillate the rock arms or levers |31 which causes oscillation of thearms or levers ist. Ihe oscillation of these rock levers wil, by thelink connections lill will cause reciprocation of the slides |92 in theguides ist and consequently reciprocate the side summing heads Elli). Itwill be observed from Figs. 9 and 10 that when the middle gumming headis swung to the left the right side gumming head is depressed while whenthe middle gumming head is swung to the opposite position the leftgumming head is depressed. This is to prevent interference between themiddle and side heads and to effect this the cams |8| and |82 are soarranged as to effect alternate upward movements of the arms |811 intimed relation to the oscillations of the lever |52 and consequently ofthe middle gumming head.

The middle gumming head in this head'the frame |51 supports at its upperpart an air cylinder 26| and in its lower part an adhesive dispensingcasing 252 the center of which is axially alined with the cylinder 28|.The upper end of the cylinder Zl has a head 203 secured thereon byscrews 2M. Slidable in the cylinder 26| is a piston comprising an upperplate 255, a lower plate Zii and a cup-shaped packing 291. A compressionspring 2&9 is located between the head 2235 and the plate 2% to urge thepiston downwardly. Vents 2l|l serve to permit the influx and escape ofair as the piston moves. The piston is provided with a piston rod 2l!Awhich is secured to the piston by nuts 2|2 and a lock nut ZES. 'Throughthe lcenter of the head 2%3 is a stop screw 2M having a lock nut 2l5 bymeans of which theupward movement of the piston may be adjustablylimited, to control the opening of the valve and the'amount of gumapplied. On the lower end of the cylinder 2m is a head Z'l held in placeby screws. This head carries a stuing box 2li' and the piston rod 2Hpasses through this stuing box and carries on its lower end a cross head2l8. Between the piston and the head 2|Ei the wall of the cylinder isprovided with an air port 229. An air supply pipe 2|9 is connected tothe port 2id by a suitable elbow. i

The lower Iend of the casing 2212 is provided with a pair of threadedopenings 22d wherein are screwed a pair of air nozzles 22|. In thecasing 262 is a partition 222 dividing the casing into an upper adhesivecompartment 223 and a lower air compartment 221i. The partition 222 isprovided with a pair of screw threaded openings 225 and screwed in theseopenings is a pair of adhesive nozzles 225 having tapered lower endsIentering the air nozzles 22|. The nozzles 226 are provided exteriorlywith ribs 22'! serving to constitute vanes for directing the iiow of airbetween said nozzles 22| and 225. 'Ihe top of the casing is closed by ahead 22S secured by screws 22e and having openings alined with thenozzles and provided with tubular guide extensions Zilll. Through thehead and its guides pass needle valves 23| which normally close thenozzles 226. The valves 23| are connected to the head 2|2. A port 232serves to admit adhesive to the chamber 223 and thus to the nozzles 226and communicates by an elbow 237| with an adhesive supply pipe 238. Anair port 239 is provided for the admission of air to the chamber 224 andleads to an elbow 24? to which is connected an air supply pipe 26|.

In the operation of this gumming head, air under pressure is admitted tothe cylinder 25| beneath the piston which causes it to move upwardly andopen the valves 23|. Air under pressure is also admitted to the chamber22d and will flow out through the spaces between the nozzles 22| and226, thus assisting the flow of adhesive from the chamber 223 by reasonof the aspirating effect of such outfiowing air.

The side gummz'ng heads As before noted there are two of these gummingheads 22|) and these heads are alike in construction. Fig. 19 is asection through one such head and consists of an upper air cylinder 233'having a head 23d similar to the head 25 and like it provided with anadjustable stop screw 235'. A spring 23d' urges a piston 23'i', of thesame detail construction as the middle head piston, downwardly and apiston rod 232' is iixed to the piston 23? and extends downwardlythrough a stuffing box 23S carried by the lower head 222' of thecylinder 233. This gumrning head also has a lower cylinder 21H' dividedby a partition 2&2 into an upper adhesive chamber M2' and a lower airchamber 2&3. An air nozzle 2M and an adhesive nozzle 2&5 are provided inconnection with this cylinder 2M'. A needle valve 246 is formed on thelower end of a stem 2M which passes through the removable head 2i8 andis connected to the rod 2758 as at 2M. The construction of this part isthe same as that shown in the center gurnming head which is shown inFig. 16. The cylinder 233 has an elbow 250 screwed therein to form aport for admission of air beneath the piston 2.21' and for connection ofair pipes 25| and 25| for the two gumming heads. The cylinder 2LH has aport 252 leading to the adhesive chamber 262 and an elbow 253 (Fig. 1l)affords communication between this port and an adhesive'supply pipe256i. An elbow 255 provides connection between the air chamber 2% and anair supply pipe 255 for the right gumming head, a similar pipe 255'supplying air to the left gumming head.

The operation of these side gumming heads is the samje as lthatdescribed in connection with the middle gumming head.

The air supply in general In order to supply the necessary'air foroperation of the Various mechanisms a suitable source of air underpressure (not shown) has a pipe 25? leading therefrom to the upper endof an air supply control valve indicated in general at 253. From thisvalve 253 apipe 259 leads to an air header 28d.

The header has pipes 22|, 262 and 223 leading respectively to individualcontrol valves 261i, 285, and 225 for the three gumrning heads and fromthese valves lead the pairs of pipes 25V and 255 2lb and 243| and 25|and 255.3. The three valves 254, 265, and 2%, are of the sameconstruction and but one of these will be described in detail.

The main air control valve and its cpc-ration Referring especially toFigs. 1, 5, 8, lll, and 15 it will be seen that a bracket 262 issupported from the packaging machine 32 and this bracket is providedwith a pair of spaced bearings 228 wherein is journalled a shaft 259which is positioned parallel to the shaft 3l. On the shaft 31 is fixed agear 27B which meshes with a gear 2li Xed on the shaft 229. Fixed on theshaft 2S?) is a governor comprising a disk 2'i2. On the disk 222 a pivot273 supports a governor lever having a short arm 2id carrying a plunger225 which works through a sleeve 2l@ xed on the disk. The lever also hasan arcuate long arm 2li carrying a governor ball 222 which oscillatesbetween padded stop members 2li! and 282. A compression spring 22| ismounted on the plunger 215 and biases the ball 212 towards the stop 23Bwhich limits the inmost position of the ball as when the shaft 3l' isstopped. Pivoted to the bracket is a bell crank having an upstanding arm282 provided with a laterally bent end and a horizontal arm 283. Theshort arm 2M carries on its outer end a trip head 22d which by theaction of the governor is projected beyond the bent upper end of the arm282 so that the trip arm may pass without engaging the arm 282. When,however, the shaft slows down, as in coming to rest, the head 22d isbrought into the path of the bent end of arm. 232 and biases the bellcrank so that the arrn 232 tilts outwardly and arm 2223 tiltsdownwardly. Connected to the outer end of the arm 223 is the lower endof a connecting rod 225. Mounted on a support 222 (Fig. 14) is a bracket281 carrying bearings 288 which support a shaft 28s. On the shaft 239 ismounted a sleeve 22] from which projects a rock arm 29| to which theupper end of the rod 285 is connected. The sleeve 22d also carries anupstanding rock arm 292 having a notch 293 at one side of its end. Inrunning position a pin 2@ is engaged in this notch and this pin iscarried by a lever pivoted intermediate its ends to a bracket 295 toprovide an outer arm 2% to which the pin is axed and an inner trip arm2537. A spring 228 is connected at its upper end to the arno 2% and atits lower end to the bracket 221. rInis tends to bias the arm 2STupwardly but, so long as the shaft 3l is running, the notch 293 willengage the pin 28d and hold the arm down, when the pin 29d on arm 295 israised in engagement with notch 293 on rock arm. 292.

A bracket 299 supports the valve A 253. The valve 258 includes acylindrical casing 330 having an open lower end provided with a flange30| resting on the bracket 299 and secured thereto by bolts 392. Anipple 393 is screwed into the upper end of the casing 399 and in thisnipple is screwed the supply pipe 251'. In the casing 390 is formed apair of partitions 394 and 395. These partitions are so located that theoutlet pipe 259 leads from the casing 303 between the partitions. In thepartition 394 is screwed a nipple 39E having a valve seat 391 formed onits lower end. A nipple 398 is screwed in the partition 395 and isprovided at its upper end with a valve seat 309. The nipple 398 has apartition 3I in its lower part and is provided with a central valve stemopening around which are arranged air vents 3l I. A valve stem SI2passes through this valve stem opening and carries a double faced valve3I2 on its upper end between the valve seats, space being left betweenthe seats so that each seat will be open when the other is closed. Aplug 3I3 lits in the lower end of the casing and has an opening whichprovides a guide for the valve stem 3 I 2. A vent port 3M is formed inthe casing below the partition 395. The valve stem passes downwardlythrough an opening 3I5 in the bracket 299 and terminates above the freeend of the lever arm 291 in slightly spaced relation thereto. A spring355 (Fig. 14;) has its lower end connected to a bracket 3I1 formed on orXed to the connecting rod 233 and the upper end of this spring isconnected suitably to the bracket 281.

As shown in Fig. 15 the valve is shown in full lines as closing thelower valve, this being its normal running position, and in broken linesin position to close the upper valve.

It will be noted, from what has previously been explained in relation tothe governor, that so long as the governor disk is rotating the bellcrank 232, 233 will be held with the arm 283 raised, this being eiectedby the springr3I5. This of course will holdithe lever arm 293 latchedupwardly. The valve will be held in the normal full line position by itsweight and the air pressure on top of the valve. If, however, the shaft31 stops there the bell crank will be tilted, the rock arm 292 swung torelease the lever arm 296 which will permit it to be pulled down by thespring 289. The arm 231 will swing up, engage the valve stem 3l2 andraise the valve 3I2 to the broken line position of Fig. l5. This willclose the entry of air from 251 and at the same time will permit the airunder pressure to escape from the header 269 and pipes connected theretothrough the vents 3l I and 3 I.

The gumming head control valves The detail of construction and operationof the valve 263 is shown in Figs. to 2'5, inclusive. The other valvesare identical in construction. The valve 233 comprises a casing 3I8having an inverted frusto-conical bottom 3I9 having a central dependingtubular boss 329. The top of the casing is closed by a cover 32H held tothe casing by screws 322. A gasket 323 is interposed between the coverand casing to provide an air tight joint. The cover 32I is provided witha screw threaded opening in which is screwed one of the pipes leadingfrom the header 269, the pipe here shown being the pipe 263. In thebottom 359 of the casing 3I3 is a pair of ports 324 and 325 to which areconnected one pair of the pipes leading to the particular gumming headcontrolled by the corresponding Valve. In .each instance the pipe to theupper or air cylinder is connected to the port 325 and the pipe leadingto the lower or adhesive cylinder is connected to the port 329. In thecasing SIB is an inverted frustoconical valve 323 having a valve stem321 which projects downward through the boss to terminate well below theboss so that an operating lever 328 can be adjustably mounted on saidvalve stem. The valve 323 is provided with a circular port 329 which maybe brought into and out of registry with the port 325 by rotation of theValve. The valve is also provided with an arcuate port 333 which maysimilarly be caused to register with the port 32d. Also a groovedpassage 33| is formed on the under side of the valve 3I3 and in acertain position of the valve the passage 33| will register withthe'port. The valve casing is also provided with an exhaust port 332wherewith the passage 33I may register at the time it registers with theport 325 so that the air may be eX- hausted from beneath the upper orair cylinder of the respective gumming head.

To operate the valves 234, 265, and 233 the shaft 81 has three groovedcams 333, 334, and 335, which actuate respective bell crank levers 333,331, and 338. Links 339, 330, and 33| connect the bell cranks with theoperating levers 328 of the several valves. It is understood that thecams 333, 334, and 335 are so positioned on the shaft 31 that the valvesoperate in proper sequence.

'Ihe operation of each valve is as follows: The normal position of thevalve 326 is shown in Fig. 2l and in that position the ports 329 and 330are in closed position so that no air can flow to the gumming head whichis connected to the particular valve. The operation of the valves isalso timed in relation to the downward movement of the gumming heads, aspreviously described. The respective gumming heads move down and thevalve now moves in the direction of the arrows until the ports 339 and324 register, which admits air to the lower cylinder so long as theforward end of the port 339 registers with port 324. In this positionair simply blows out between the air and adhesive nozzles. Movement ofthe valve continues and the port 329 registers with the port 325, therear end of the port 324 now registering withthe rear end of port 330.The valve is now fully open and, while air still continues to flow tothe lower cylinder of thegumming head, the air will flow to the uppercylinder and raise the piston, thus opening the adhesive nozzles for theow of adhesive. The valve 326 starts in reverse motion and when theposition shown in Fig. 24 is reached the passage 331 connects the ports325 and 332 so that air will be exhausted from the space beneath thepiston in the upper cylinder so that the needle valve or valves willclose. Now it is to be noted that the needle valves have tips 23|. Whenthe needle valves close these tips clear the passage in the points ofthe adhesive nozzles 225. At the same time the port 330 will move untilthe port 324 registers with its forward end. Thus after the needlevalves close air will continue to blow through the space between the airnozzle 23| and adhesive nozzles 22B and clean the tips 23I. Thus anyclogging of the adhesive nozzles, or jamming of the needle valves isprevented.

Adhesive storage and supply Mounted on top of the frame is an adhesivetank 342 having a glazed sight opening 343 through which the height ofthe tank contents may be observed. This tank is closed by a lid 345carrying a supply pipe 356 whereby adhesive may be introduced into thetank. The lid closes the tank except that a water sealed vent 341, issecured to the cover. Secured to the cover is a bracket 348 whereto ispivoted a bell crank having a long arm 349 and a short arm 351i. The arm3d@ carries a iloat 35i which tends to float on the adhesive 352 in thetank. The arm 35i! is connected by a link 353 to one arm 354 of a bellcrank lever pivoted to a bracket 355 carried by the cover. The remainingarm 356 of this lever carries a valve 35'! which is held closed by theaction of the float until the adhesive sinks below a predeterminedheight whereupon the fioat will move down and open said valve to admitmore adhesive. From the tank extend tubes 251i', 23S, and 251i, whichlead to the adhesive chambers of the respective gumming The generaloperation The operations of the several parts of the mechanisms havingbeen previously described immediately following descriptions of theirconstructions, it is not deemed necessary to again particularize theseoperations. In general, however, the operations on a filled bag may betraced as follows:

Through the action of the packaging machine v the bag is brought tostation A for action thereon by the gumming machine. The movement of thebag ceases for such period of rest as to enable the gumming operationsto be performed. As the bag moves into such position the mechanismcoupling the upper cam shaft to the lower cam shaft is tripped by thebag and the upper shaft controlling the air supply starts rotation. Thenrst action on the bag itself is that the cam lll operates to effectclosing of the bag at its 1r neck. This is followed by the action of thecam l2@ on the mechanism controlled thereby, which causes opening of themouth of the bag. Then the cam itt elects lowering of the middle gumminghead while the cam lil effects, through the y" mechanism controlledthereby, oscillation of the middle gumming head. As this head is loweredand oscillated, the air valve controlling the pipes leading theretoeffects opening of the a-dhesive nozzles of the head and adhesive isapplied inside the edge portions of the bag mouth. At the same time themechanisms controlled by the cams itl and E82 and the air valvecontrolled by the cams 333 and 335 operate to effect alternate loweringand opening of the side gumming heads and the deposition of adhesive inthe fold portions 355 of the bag. The bag is thus gummed for closing.The gumrning heads are now closed and retracted, whereupon the bag isagain put in motion by the packaging machine. As the bag leaves thestation A the upper cam mechanism is disconnected from the lower cammechanism and thus the air control valves cease to operate until thenext filled bag is moved into position for operation thereon.

ilo'

Having thus described the invention, what is claimed as new, is:

l. In a gumming machine for filled bags with open mouths, means to pinchthe upper part of the bag above its contents to form a flat mouth andclosed neck, means to pull the sides of the bag apart above said neck toopen the mouth, gumming means for applying adhesive to the inner facesof the opened mouth, other gumming means for applying adhesive to theexterior of the open mouth within the indented side folds thereof, andoperating means for operating the foregoing means in timed relation.

2. In a gumming machine for filled bags with open mouths, means to pinchthe upper part of the bag above its contents and form a flat mouth andclosed neck, mouth opening means for pullthe sides of the mouth apartabove said closed neck and exposing the inner faces of the mouth sides,a middle gumming head above the last mentioned means and movablevertically toward and from the bag mouth, operating means for saidgumming head effecting vertical and oscillating movements thereof, meansfor supplying gum to said middle gumming head during an oscillatingmovement thereof for applying adhesive to said inner faces, lateralgumming heads for applying adhesive to the exterior of the indented sidefolds of the bag mouth and movable toward and from said bag mouth ends,and operative means for reciprocating said lateral gumming means intimed relation to the movements of the middle gumming head.

3. In a gumming machine for filled bags with open mouths, means to pinchthe upper part of the bag above its contents to form a dat mouth andclosed neck, means to pull the sides of the bag apart above said neck toopen the mouth, gumming means including gumming heads for applyingadhesive to the inner faces of the opened mouth, other gumming meansincluding gumming heads for applying adhesive to the exterior of theiiat mouth within the indented side folds thereof, operating means foroperating the foregoing means in timed relation, air pressure controlledmeans effecting flow and stoppage of adhesive from said gumming heads,and means to effect operation of said air pressure controlled means intimed relation to the air pressure controlling means.

fl. In a gumming machine for filled bags with open mouths, means topinch the upper part of the bag above its contents and form a fiat mouthand closed neck, mouth opening means for pulling the sides of the mouthapart above said closed neck and exposing the inner faces of the mouthsides, a middle gumming head above the last mentioned means and movablevertically toward and from the bag mouth, operating means for saidgumming head effecting vertical and oscillating movements thereof, meansfor supplying gum to said middle gumming head during an oscillatingmovement thereof for applying adhesive to said inner faces, lateralgumming heads for applying adhesive to the exterior of the indented sidefolds of the bag mouth and movable toward and from said bag mouth ends,operative means for reciprocating said lateral gumming means in timedrelation to the movements of the middle gumming head, air prersurecontrolled means effecting now and stoppage of adhesive from said heads,and means to effect operation of said air pressure controlled means intimed relation to the head controlling means.

5. In a 'gumming machine for lled bags with open mouths, means to pinchthe upper part of the bag above its contents to form a flat mouth andclosed neck, means to pull the sides of the bag apart above said neck toopen the mouth, gumming means including gumniing heads for applyingadhesive to the inner faces of the opened mouth, other gumming meansincluding gumminrf heads for applying adhesive to the exterior of theflat mouth at the indented side folds thereof, operating means foroperating the foregoing means Ain timed relation, air pressurecontrolled means effecting iiow and stoppage of adhesive from saidgumming heads, means to e'ect operation of said air pressure controlledmeans in timed relation to the air pressure controlling means, anadhesive storage tank, and manually controlled means for conductingadhesive from the tank to the several heads.

6. In a gumming machine for filled with open mouths, means to pinch theupper part of the bag above its contents and form a flat mouth andclosed neck, mouth opening means for pulling the sides of the mouthapart above said closed neck and exposing the inner faces of the mouthsides, a middle gurnming head above the last mentioned means and movablevertically toward and from the bag mouth, operating means for saidgumming head effecting vertical and oscillating movements thereof, meansfor supplying gum to said middle gumming head during an oscillatingmovement thereof for applying adhesive to said inner faces, lateralgumming heads for applying adhesive to the exterior of the ends of thebag mouth and movable toward and from said bag mouth ends, operativemeans for reciprocating said lateral gumming means in timed relation tothe movements of the middle gumming head, air pressure controlled meanseffecting ow and stoppage of adhesive from said heads, means to effectoperation of said air pressure controlled means in timed relation to thehead controlling means, an adhesive storage tank, and manually contr.led means for conducting adhesive from. the tank to the several heads.

'7. In a gumming machine for filled bags with open mouths, means topinch the upper part of the bag above its contents to form a'at mouthand closed neck, means to pull the sides of the bag apart above saidneck to open the mouth, gumming means including gumming heads forapplying adhesive to the inner faces of the opened mouth, other gummingmeans including gulnmlng heads for applying adhesive to the exterior ofthe flat mouth at the ends thereof, operating means for operating theforegoing means in timed relation, air pressure controlled meanseffecting flow and stoppage of adhesive from said gumming heads, meansto effect operation of said air pressure controlled means in timedrelation to the air pressure controlling means, and means to effectengagement and disengagement of the air pressure controlling means toand from the means for operating the gumming heads.

8. In a gumming machine for filled bags with open mouths, means to pinchthe upper part of the bag above its contents to form` va `iiat mouth andclosed neck, means to pull the sides of the bag apart above said neck toopen the mouth, gumming means including gumming heads for applyingadhesive to the inner faces of the opened mouth, other gumming meansincluding gumming heads for applying adhesive to the exterior of theflat mouth at the ends thereof, operating means for operating the foregoing means in timed relation, air pressure controlled means eectingflow and stoppage of adhesive from said gumming heads, means to effectoperation of said air pressure controlled means in timed relation to theair pressure controlling means, an adhesive storage tank, manuallycontrolled means for conducting adhesive from the tank to the severalheads, and means to eect engagement and disengagement or the airpressure controlling means to and from the means for operating thegumming heads.

9. In a machi; e of the kind descrioed, a rotatable cam shaft, a camthereon, a rock lever actuated in one direction by said cam, a pair oigear connected rock shafts, a rock lever secured. on one of said rockshafts, a connecting rod having its ends connected to said rock levers,a pair of arms carried by said rock shafts, a pair of bag closing bladespositioned opposite each other and movable toward and from each otheropposite the upper part of the bag, links connecting said arms to saidblades, and spring means holding the first rock lever against the cam.

l0. In a machine of the class described, a rotatable cam shaft, a camthereon, a rock lever actuated in one direction by said cam, a connectngrod having its lower end connected to said rock shaft, a bell crankhaving one arm connected to the upper end of said connecting rod, a pairof gear connected rock levers, a rock arm connected xedly to one of saidrock levers, a link connecting the last mentioned rock arm with theremaining arm of the bell crank, a of connecting rods, each having itsupper end connected to a respective rock lever, a pair of rock leverspivoted between their ends to provide outer arms and inner arms, saidpair of connecting rods being connected to said outer arms, bag mouthopening fingers on the said inner cams, and spring means for holding theIirst rock lever against its cam.

11. In a device of the kind described, a gum ming head, a framerockingly supporting said gumming head, means to guide said head in avertical path, a cam shaft, 'a cam Xed thereon, a rock lever actuated bysaid cam, a connecting rod having its lower end connected to the rockshaft, a rock lever pivoted intermediate its ends, said connecting rodbeing connected to one end of the last mentioned lever, a linkconnecting the other end of said last lever with said frame,

and means to rock said gumming head in said frame.

l2. In a device of the kind described, a gumming head, a framerockinsfly supporting said gumming head, means to guide said head in avertical path, a cam shaft, a cam fixed thereon, a rock lever actuatedby said cam, a connecting rod having its lower end connected to the rockshaft, a rock lever pivoted intermediate its ends. said connecting rodbeing connected to one end of the last mentioned lever, a linkconnecting the other end of said last lever with said frame. a secondcam shaft geared to the first shaft, a second cam on said second shaft,a two armed rock lever having a lower arm controlled by said second cam,a link having one end connected to the other arm of said two armedlever, a second two armed rock lever having a lower arm to which thelast mentioned link is connected. a

rack bar guided for longitudinal movement, a link connecting the secondtwo armed rock levers with said rack bar, a gear segment meshing withsaid rack bar, a slotted arm extending from said segment, said gumminghead having trunnions on which the head is mounted in the frame, an armmounted on one of said trunnions, and a pin on the end portion of thelast named arm.

13. In a device of the kind described, a pair of diagonally disposedguides, a pair of slides mounted in said guides, a pair of bell crankstructures, each having link connection to a respective slide, a pair ofgummng heads, each carried by a respective slide, a cam shaft, a

pair of cams on said shaft, a second pair of bell crank structuresactuated by said cams, and connecting rods connecting the rst pair ofbell crank structures with the second pair thereof, said cams beingpositioned to effect alternate depression of the gumming heads.

14. In a device of the kind described, a gumming head, a frame rockinglysupporting said gumming head, means to guide said head in a horizontalpath in a vertical plane, means to raise and lower said frame, means torock said gumming head in said frame, and meansfor feeding adhesivethrough said head under pressure While traversing said path.

HELMER ANDERSON.

